ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Water-sorption isotherms have been determined for some bisphenol-A-type epoxy resins cured with either 4,4′-diamino diphenyl methane (DDM), phthalic anhydride, or polyamide, Versamid 115. The absorption isotherms for the diamine-cured resin are reversible and that at 0.2°C is linear for the whole accessible range of relative pressures (0 ≤ h ≤ 1). With increase in temperature deviations from Henry's law occur at successively lower relative pressures. It is shown that these deviations from Henry's law are related to a concentration dependence of the isosteric heat of absorption. Sorption by both the polyamide and phthalic-anhydride-cured resins is not reversible; there are weight increases following an absorption-desorption cycle.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1984.070290611
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